I am guessing this is a reference request, perhaps the citations at the bottom are what Dr. Stasheff is looking for. I would think that this was known before those papers, but I am not confident.
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Sean TilsonApr 2 '13 at 23:18

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I'm not sure why I'm telling you this, but I think that Husemoller-Moore-Stasheff is a good reference...
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John PalmieriApr 3 '13 at 0:21